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ROHM KDZVTR4.7B
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- ROHM KDZVTR4.7B
- Type
- ROHM
- Unit
- Electronic Component
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- ROHM
- Electronic Component
- KDZVTR4.7B
- Electronic Component
- 1
- Package
- SOD-123FL
- Electronic Component
- Zener Diode
- Electronic Component
- 0.032g
- Electronic Component
- 1
- Electronic Component
- BM0227699848
- Diode
- 1
- Current(Ir)
- 20uA@1V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 4.7V~5.2V
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
KDZVTR4.7B 产品概述
一、产品简介
KDZVTR4.7B 是 ROHM（罗姆）推出的独立式稳压二极管，标称稳压值 4.7V，实际稳压范围 4.7V～5.2V。器件以 SOD-123FL 表贴封装提供，适合空间受限的表面贴装应用，常用于低功耗电路的稳压、基准与浪涌抑制场合。
二、主要性能参数
- 型号：KDZVTR4.7B（ROHM）
- 稳压值（标称）：4.7V
- 稳压范围：4.7V ～ 5.2V
- 反向电流 Ir：20 µA @ VR = 1.0V（典型泄漏，随温度上升）
- 耗散功率 Pd：1W（器件极限，实际使用需考虑散热与降额）
- 封装：SOD-123FL（小型表贴，适合自动贴装与回流焊）
三、典型应用场景
- 作为旁路稳压（Shunt Regulator）提供低成本的参考电压或局部稳压
- 过压或浪涌抑制，保护敏感器件或接口线路
- 电源监测、偏置电路、仪表与传感器前端的基准源
四、封装与焊接注意事项
SOD-123FL 为小型塑封表贴件，焊接推荐使用回流焊工艺。注意控制回流温度曲线与焊盘尺寸，避免过度温度导致器件应力。为保证 1W 功耗时的可靠性，应关注 PCB 的铜箔散热面积与热阻路径，必要时加大铜箔或通过孔以改善散热。
五、选型与使用建议
- 热设计：稳压二极管的耗散功率 Pd = Vz × Iz。若在器件上承受全部稳压功率，则 Iz_max ≈ Pd / Vz ≈ 1W / 4.7V ≈ 213 mA，但长期工作时应按降额原则设计（通常远低于峰值）。
- 串联限流：在用作旁路稳压时，通过 R 限流：R = (Vin − Vz) / I。设计时需兼顾最小工作电流（保证 Vz 稳定）与最大电流（不超过 Pd）。
- 泄漏与温漂：Ir 在低电压下为 20 µA（@1.0V），温度上升会使泄漏增大，对高阻负载或精密基准场合需额外注意。
- 参考原厂规格书：如需更详细的温度系数、动态电阻、最大反向电压等参数，请参照 ROHM 的数据手册以获得完整规范与典型曲线。
六、可靠性与品质保证
ROHM 品牌提供产业级制造与测试，适合工业与消费类电子。为确保长期可靠性，建议在实际电路中进行热仿真与寿命验证，遵循封装焊接规范，并在设计中留有安全余量，避免器件长时间在极限功耗下工作。
综上，KDZVTR4.7B 以小型表贴封装、约 4.7V 的稳压特性和 1W 的耗散能力，适合用于多种低成本稳压与保护应用，是空间受限电路中常用的稳压二极管选择。
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